Automatic Flight

Question 1

components of the auto flight system

Answer 1

The Automatic Flight System (AFS) consists of
 2 Flight Control Computers (FCC)
 Flight Control Panel (FCP)
 1 dual autothrottle servo
 1 stick pusher
 1 yaw damper actuator
 7 position sensors
 3 dual autopilot servos

Question 2

How to connect and disconnect auto throttle

Answer 2

AUTO FLIGHT Switch
ATS thrust limit, Clamp Thrust, limit /target , speed protection,IAS/mach, retard

ATS disconnect Switches on outboard side of each throttle

Question 3

Mach trim provided to FCC

Answer 3

Only with Autopilot off , Stab will automatically move to compensate for pitch forces caused by Mach number, If inop an alert will be displayed

Question 4

Altitude Select knob

Answer 4

Rotate -sets altitude if PROF is engaged sets ams clearance ceiling
Pull- FLIGHT LEVEL CHANGE climb or descend directly to selected altitude ATS will go to Climb thrust or idle descent as required FCP altitude
Push Airplane will hold current altitude ,
altitude will display on FCP,FMA and PFD

Question 5

Explain the HDG/TRK selector

Answer 5

Pull goes to heading in window, Push maintains current heading

Question 6

Bank angle limit Selector

Answer 6

Rotate- Selects max bank angle in 5 degree increments
AUTO- Bank angle limits very with speed selector cannot override FMS bank angle limits Limits are displayed at the top of the PFD attitude sphere
not in TO,GA,LOC modes or FMS NAV switch

Question 7

which FCP buttons arm or engage FMS

Answer 7

FMS SPD - Selects the armed FMS speed, display window turns to dashes and the FMA speed changes white to magenta Preselecting an FCP speed with the IAS select knob and immediately pushing the switch can edit FMS speed

NAV switch Push arms the FMS NAV capture mode or resumes FMS lateral control

Nav/Arm can be cancelled by selecting HDG/TRK hold,APPR/LAND arm capturing the localizer or capturing FMS NAV
PROF Switch
Push- Engages FMS vertical profile guidance

Question 8

How to engage autopilot one or two

Answer 8

Autoflight switch–Push
engages- ATS and one AP in the FD mode that has been selected

If no FD mode has been selected the AP engages in HDG/TRK HOLD and either altitude (if level) or vertical speed hold(if climbing/descending)

After engagement each push alternates between AP! and AP2

Question 9

FMA speed control window differences between FMS and AFS speed modes

Answer 9

Magenta when FMS speed is engaged and the airplane is controlling to an FMS or pilot selected speed

White when AFS speed mode is engaged and controlling to pilot selected speed

Question 10

Annunciations associated with the Speed Control Window

Answer 10

When thrust mode is on ATS should be engage if not ATS OFF box appears. IF ATS is INOP amber ATS OFF box appears

If a speed has been commanded that cannot be maintained due to vertical speed of FPA , the speed and mode will flash, Flashing continues until the airplane accelerates towards target speed

if the mode changes due to auto reversion the new mode flashes 5 times

If speed protection engages, HI SPEED or LO SPEED PROTECTION will be displayed

Windshear warnings are displayed by a flashing white WINDSHEAR followed by steady white WINDSHEAR

Question 11

Annunciations associated with roll control Window

Answer 11

 Shows roll mode. Digits are displayed in HDG or TRK mode.
 Engaged AP (1 or 2) is shown.
 FMS modes are magenta, pilot and AFS modes are white.
 AUTOLAND mode is green.
 If the mode changes due to an auto reversion, the new mode flashes 5
times.

Question 12

annunciations associated with FMA Altitude Control Window

Answer 12

FMS FCP altitude and profile magenta white,Armed mode above engaged Ground Prox, windshear

 Shows FMS or FCP target altitude and profile mode. FMS altitudes and
modes are magenta. Pilot selected altitudes and modes are white.
 If the mode changes due to an auto reversion, the new mode flashes 5
times.
 Armed modes are shown above the engaged mode.
 The GROUND PROX warning is in red and flashes with the engaged
mode.
 The WINDSHEAR mode annunciation has priority over all modes
including GPWS

Question 13

Features of the GA switches

Answer 13

 FDs pop-up to GA (even if off)
 AP, if on, will follow FD commands
 ATS goes to go-around thrust limits
 Parallel rudder is active
 Bank limited to 10 degrees
 Reference speed, PITCH and GO-AROUND appear on FMA
 Windshear guidance comes on if windshear warning is active

Question 14

features of the AFS OVRD switch

Answer 14

push down allows emergency disconnect of respective AP,ATS and YAW damper

Question 15

Features of the Windshear Alert and Guidance System WAGS

Answer 15

 During takeoff, approach and go-around, the WAGS system provides
visual/aural windshear warnings and AP/FD windshear guidance
 On takeoff, WINDSHEAR appears on the PFD and the FMA
speed/altitude windows if windshear is detected and three cycles of
TAILWIND SHEAR or HEADWIND SHEAR will sound. The FD will
command V2 + 30 On App and Go-around: same visual and aural annunciations will
activate. PFD speed bug will go to 1.3Vs + 20 and the ATS, if on, will
control to this speed.
 On Go-around: Guidance will not be available unless GA button is
pushed or throttles are advanced past 95% GA thrust limit once
windshear is detected.
o ATS, if off, will come on automatically and advance to GA limit
o FD, if off, will pop up automatically
 For takeoff, approach and go-around, the PLI indicates the difference
between aircraft AOA and stick shaker AOA.
o At stick shaker AOA, the cyan PLI will turn RED.
o PLI is to be used as an indication only – and not for guidance
 GPWS is inhibited during windshear guidance when FD commands are
being followed
 TCAS is also inhibited (except for TA advisories on the ND)

Question 16

what is the thrust mode for push or pull of the altitude know

Answer 16

Climb thrust or idle descent

Question 17

when does the Wags system work

Answer 17

takeoff, approach and go around

Question 18

what happens to wags on takeoff

Answer 18

Headwind shear Tailwind shear sound FD will command v2+30

Question 19

what happens on landing or Goaround

Answer 19

Headwind shear Tailwind shear sound bug goes to 1.3vs+20

Question 20

On go around when is Wags available and what does it do

Answer 20

GA button pushed or throttles advance to 95% GA
FD will pop up automatically
ATS will come on automatically if off
At stick shaker AOA the cyan PLI will turn RED
GPWS inhibited when FD commands are being followed
TCAS is also inhibited

Question 21

What does the NAV switch do and how cancelled

Answer 21

Arms the FMS NAV capture mode or resumes FMS lateral control can be cancelled by selecting HDG/TRK hold,APPR/LAND arm , capturing the localizer, or capturing the FMS NAV

Question 22

when the speed window shows thrust what does that imply

Answer 22

auto throttles should be on unless ATS OFF box appears